128721180

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{306479}}^1$

素因数の和:306498

約数の個数: 48

約数和(自身を含む): 411909120

約数和(自身を除く): 283187940

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 306479, 612958, 919437, 1225916, 1532395, 1838874, 2145353, 3064790, 3677748, 4290706, 4597185, 6129580, 6436059, 8581412, 9194370, 10726765, 12872118, 18388740, 21453530, 25744236, 32180295, 42907060, 64360590, 128721180]

約数ペア:

[(1, 128721180), (2, 64360590), (3, 42907060), (4, 32180295), (5, 25744236), (6, 21453530), (7, 18388740), (10, 12872118), (12, 10726765), (14, 9194370), (15, 8581412), (20, 6436059), (21, 6129580), (28, 4597185), (30, 4290706), (35, 3677748), (42, 3064790), (60, 2145353), (70, 1838874), (84, 1532395), (105, 1225916), (140, 919437), (210, 612958), (420, 306479)]